Changes

[[File:{{Infobox console|title = Sega Genesis / Mega Drive|logo = RS39200_Megadrive.png|image = Sega-Genesis-Mk2-6button.jpg|thumbimage2 = Sega-Nomad-Front.jpg|250pximagecaption = '''Top:''' Sega Mega Drive.<br/>'''Middle:''' Sega Genesis Model 2 with 6-button controller.<br/>'''Bottom:''' Sega Genesis Nomad, portable variation.|developer = [[:Sega]]|The type = [[:Category:Consoles|Home video game console]]|generation = [[:Category:Fourth-generation video game consoles|Fourth generation]]|release = 1988|discontinued = 1997|predecessor = [[Master System emulators|Master System]]|successor = [[Sega GenesisSaturn emulators|Saturn]]|emulated = {{✓}}}}The '''[[gametech:Sega GenesisSega_Genesis|Sega Genesis]]''' is a 16-bit, 4th fourth-generation console released by [https://en.wikipedia.org/wiki/Sega Sega] in Japan on October 29, 1988 and in the US on August 14, 1989 in North America. It had a Motorola 68000 CPU at 7.6 MHz and a Zilog Z80 at 3.58 MHz. In other regions, it was known as the '''Mega Drive'''. It had several add-ons, including the Sega CD (a CD add-on, called Mega CD outside America) and the 32X (a 32bit 32-bit, cartridge -based add-on). 

The Sega CD was released on October 15, 1992 and retailed for {{Inflation|USD|299.99|1992}} and had a Motorola 68000 CPU at 12.5 MHz and 64 kbit of RAM. The Sega 32X was released on November 21, 1994 for {{Inflation|USD|159.99|1994}}. It had 2 SH-2 RISC CPUs at 23 MHz with 256KB of RAM and 256KB of VRAM. Genesis emulation is very good, with a high degree of game compatibility (many of them claiming nearly 100% compatibility with commercial games, including Virtua Racing). They are available on many platforms. Many Genesis emulators also feature compatibility with the [[Master System emulators|Sega Master System]] (SMS), and the [[Master System emulators|Game Gear]] (GG) as well as earlier Sega consoles (. Genesis -based arcade boards and the Sega Pico are still sketchy), however.

{| class="wikitable"|+PC|style="text-align:center;"

! scope="col"|SMS! scope<abbr title="col"|GG! scope="col"|Genesis / Mega Drive">G/MD</abbr>! scope="col"|Sega CD

! scope="col"|Pico! scope="col"|[[Libretro|Libretro Core]]! scope="col"|Active! scope="col"|[[Recommended emulatorsEmulators|Recommended]]

|style="text-align:center;"|[[Kega Fusion]]|style="text-align:center;"|Windows, Linux, OS X|style="text-align:center;"|[http://www.eidolons-inn.net/tiki-download_file.php?fileId=574 3.64]|style="text-align:center;"|✓|style="text-align:center;"|✓|style="text-align:center;"|✓|style="text-align:center;"|✓|style="text-align:center;"|✓|style!colspan="text-align:center;10"|✓PC

|style="text-align:center;"|[[RetroArchBlastEm]]<br>(Genesis Plus GX)|style="text-align:center;"|Multi-platformWindows, Linux, macOS|style="text-align[https:center;"|1//www.retrodev.7com/blastem/changes.4html {{BlastEmVer}}]|style="text-align:center;"{{✓}} ||✓{{✗}} |style="text-align:center;"|✓{{✗}} |style="text-align:center;"|✓{{✗}} |style="text-align:center;"|{{✓}} |style="text-align:center;"|✗{{✓}} |style="text-align:center;"|{{✓}}

|style="text-align:center;"|[[ExodusGenesis Plus GX]]|style="textMulti-align:center;"platform|Windows{{GenPlusGXVer}}|style="text-align:center;"{{✓}} ||[http://www.exodusemulator.com/index.php/downloads/current-release 2.0.1]{{✓}} |style="text-align:center;"|{{✗}} |style="text-align:center;"|{{✗}} |style="text-align:center;"|{{✓}} |style="text-align:center;"|✗|style="text-align:center;"{{✓}} |✗|style="text-align:center;"|✗{{✓}}

|style="text-align:center;"|[[PicoDriveKega Fusion]]|style="text-align:center;"|Multi-platformWindows, Linux, macOS|style="text[http://www.carpeludum.com/kega-align:center;"|1fusion/ 3.8064]|style="text-align:center;"{{✓}} ||{{✓}} |style="text-align:center;"|{{✓}} |style="text-align:center;"|{{✓}} |style="text-align:center;"|✓{{✗}} |style="text-align:center;"|✓{{✗}} |style="text-align:center;"|{{✓}}

|style="text-align:center;"|[[Gens/GSMAME]]|style="text-align:center;"|Multi-platform|style="text-align:center;"|[http://segaretrowww.mamedev.org/Gens/GS r7release.html {{MAMEVer}}]|style="text-align:center;"{{✓}} ||✗{{✓}} |style="text-align:center;"|✗{{✓}} |style="text-align:center;"|{{✓}} |style="text-align:center;"|{{✓}} |style="text-align:center;"|{{✓}} |style="text-align:center;"|{{✗}}

|style="text-align:center;"|[[GensPicoDrive]]|style="textMulti-align:center;"|Windows, Linux, BeOSplatform <small>(PC)</small>|style="text-align:center;"|[http://gensnotaz.gp2x.mede/downloadspico.shtml 2.14php {{PicoDriveVer}}]|style="text-align:center;"{{✓}} ||✗{{✓}} |style="text-align:center;"|✗{{✓}} |style="text-align:center;"|{{✓}} |style="text-align:center;"|{{✓}} |style="text-align:center;"|{{✓}} ||style{{✗}}<ref group=N name="textPicoDrive>Only for the 32X as a cross-align:center;"|✗platform alternative to Kega Fusion.</ref>

|style="text-align:center;"|[http://dgensegaretro.sourceforge.netorg/Gens/GS Gens/ DGenGS]|style="text-align:center;"|Multi-platform|style="text-align:center;"|[http://sourceforgewww.netdusers.drexel.edu/projectsgitweb/dgen/filesgitweb.cgi/dgen~korth/ 1gens.33git r7]|style="text-align:center;"{{✓}} ||✗{{✓}} |style="text-align:center;"|✗{{✓}} |style="text-align:center;"|✓{{✗}} |style="text-align:center;"|{{✗}} |style="text-align:center;"|{{✗}} |style="text-align:center;"|{{✗}}

|style="text-align:center;"[[Exodus]]|Windows|[http://aamirmwww.hacking-cultexodusemulator.com/index.orgphp/wwwdownloads/regen.html Regencurrent-release {{ExodusVer}}]|style="text-align:center;"{{✓}} |Windows, Linux|style="text-align:center;"|0.97(2){{✗}} |style="text-align:center;"|✓{{✗}} |style="text-align:center;"|✓{{✗}} |style="text-align:center;"|✓|style="text-align:center;"|{{✗}} |style="text-align:center;"|✗{{✓}} |style="text-align:center;"|{{✗}}

|style="text-align[http:center;"|[[Genecyst]//dgen.sourceforge.net/ DGen]|style="textMulti-align:center;"platform|[[DOS emulators|DOS]http://sourceforge.net/projects/dgen/files/dgen/ 1.33]|style="text-align:center;"{{✓}} |x.xx|style="text-align:center;"|{{✗}} |style="text-align:center;"|{{✗}} |style="text-align:center;"|✓{{✗}} |style="text-align:center;"|{{✗}} |style="text-align:center;"|{{✗}} |style="text-align:center;"|{{✗}}

|style="text[[Genecyst]]|DOS|[https://web.archive.org/web/20070205202050/http://www.zophar.net/genecyst/gcystxxx.zip x.xx]|{{✓}} ||{{✗}} ||{{✗}} ||{{✗}} ||{{✗}} ||{{✗}} ||{{✗}}|-align|[[GENS]]|Windows, Linux, BeOS|[http:center;"//gens.me/downloads.shtml 2.14]|{{✓}} ||{{✓}} ||{{✓}} ||{{✗}} ||{{✗}} ||{{✗}} ||{{✗}}|-|[[BlastEmhigan]]|style="textMulti-alignplatform|[http:center;"//byuu.org/emulation/higan/ {{higanVer}}]|{{✓}} ||{{✗}} ||{{✗}} ||{{✗}} ||{{✓}}<small>(bsnes)</small> ||{{✓}} ||{{✗}}|-|Megado|Windows, Linux, OS X|style="text[https://github.com/merwaaan/megado Git]|{{✓}} ||{{✗}} ||{{✗}} ||{{✗}} ||{{✗}} ||{{✓}} ||{{✗}}|-align:center;"|Regen|Windows, Linux|[http://rhopeaamirm.retrodevhacking-cult.comorg/fileswww/blastem_changesregen.html#v0.3.1 0.3.1972]|style="text-align:center;"{{✓}} ||{{✗}} ||{{✗}} ||{{✗}} ||{{✗}} ||{{✗}} ||{{✗}}|style-!colspan="text-align:center;10"|✗Mobile|style="text-align:center;"|✓[[Genesis Plus GX]]|style="textMulti-align:center;"platform|✗{{GenPlusGXVer}}|style="text-align:center;"{{✓}} ||{{✓}} ||{{✗}} |style="text-align:center;"|{{✗}} ||{{✓}} ||{{✓}} | class="wikitable"|+Consoles{{✓}}

! scope="col"|Name[[PicoDrive]]! scope="col"|Operating SystemMulti-platform <small>(sARM devices)</small>! scope="col"|Latest Version[http://notaz.gp2x.de/pico.php {{PicoDriveVer}}]! scope="col"|SMS! scope="col"{{✓}} ||{{✓}} ||{{✓}} ||{{✓}} |GG! scope="col"|Mega Drive! scope="col"{{✓}} |Sega CD! scope="col"|32X! scope="col"{{✓}} |[[Recommended emulators|Recommended]]{{✓}}<ref group=N name=PicoDrive />

|style="text-align:center;"|[[Genesis Plus GX]]|style="text-align:center;"|[[Wii emulators|Wii]], [[Gamecube emulators|Gamecube]]|style="text-align:center;"|1.7.4|style="text-align:center;"|✓|style="text-align:center;"|✓|style="text-align:center;"|✓|style="text-align:center;"|✓|style="text-align:center;"|✗|style!colspan="text-align:center;10"|✓Consoles

|style="text-align:center;"|[[RetroArch]]<br>(Genesis Plus GX)]]|style="text-align:center;"[[Wii emulators|Wii]], [[GameCube emulators|Multi-platformGameCube]]|style="text-align[https:center;"|1//bitbucket.7.4org/eke/genesis-plus-gx/downloads {{GenPlusGXVer}}]|style="text-align:center;"{{✓}} ||{{✓}} |style="text-align:center;"|✓{{✗}} |style="text-align:center;"|✓{{✗}} |style="text-align:center;"|{{✓}} |style="text-align:center;"|✗{{✓}} |style="text-align:center;"|{{✓}}

|style="text-align:center;"|[[PicoDrive]]|style="text-align:center;"[[PlayStation Portable emulators|PSP]], ARM Devices|style="text-align[http:center;"|1//notaz.gp2x.de/pico.80php {{PicoDriveVer}}]|style="text-align:center;"{{✓}} ||{{✓}} |style="text-align:center;"|{{✓}} |style="text-align:center;"|{{✓}} |style="text-align:center;"|{{✓}} |style="text-align:center;"|{{✓}} |style="text-align:center;"|{{✓}}

|style="text-align:center;"|[[Virtual Console]]|style="text-align:center;"[[Wii emulators|Wii]]|style="text-align:center;"|nN/aA|style="text-align:center;"|{{✓}} |style="text-align:center;"|✓{{✗}} |style="text-align:center;"|✓{{✗}} |style="text-align:center;"|{{✗}} |style="text-align:center;"|{{✗}} ||{{✓}} |style="text-align:center;"|{{✓}}

===Comparisons===;[[Genesis Plus GX]]:A very solid emulator for the Sega Genesis / Sega Master System / Sega CD / Game Gear. The only things it lack are 32X and Pico support, and a native desktop port; the only way to get this emulator on the desktop is to use the libretro core, which allows for all the benefits of RetroArch like shaders, dynamic sync, and other enhancements. The version used in [[BizHawk]] adds features for speedrunners.* ;[[Kega Fusion]] is a very good emulator :The project of an employee with previous experience at Sega. Kega Fusion has high compatibility, coded by an ex-Sega staffer! It is easy to use as well, good interface and has plugin -based filter support too. But it has some issues on newer versions of Windows.;[[PicoDrive]]:Strongly prioritizes performance over accuracy. Compatibility and accuracy isn't as good as Genesis Plus GX but it's useful on very underpowered systems like the Raspberry Pi Zero. Currently the first and only cross-platform option for 32X and Pico games.;[[Exodus]]:Think bsnes but for the Genesis. Even though higan is also getting into the Genesis game, Exodus has already achieved cycle-accuracy at the familiar cost of high system requirements. It is the newest Genesis emulator and is far from complete.;[http://aamirm.hacking-cult.org/www/regen.html Regen]:A focus on accuracy as earned it high compatibility with games, but it does not emulate the Sega CD and 32X. It also allows [[overclocking]].;[[BlastEm]]:Aims for cycle-accuracy but unlike Exodus, aims for lower system requirements. It has substantially higher compatibility than Exodus but falls short of Genesis Plus GX.;[[GENS]]:Close to Kega Fusion in features and compatibility, but has largely been surpassed by better emulators. There are many different forks and iterations of Gens, so your experience will differ quite a lot depending on which version you use.;[[higan]]:Also developing cycle-accurate Genesis emulation, akin to its very own [[Super Nintendo emulators|SNES emulator]] bsnes. It's promising but incomplete. However, it can be used in the latest builds.;[[MAME]]:Has the parent drivers <code style="color:green">genesis</code>, <code style="color:green">sms</code>, <code style="color:green">gamegear</code>, <code style="color:darkred">segacd</code>, and <code style="color:darkred">32x</code>. Green drivers are reported as OK, where red ones are reported as not working as of version 0.200.

* Regen ==Lock-On Emulation==Lock-On Technology is also very good with high compatibility. Lacks 32X and a unique feature found on Sonic & Knuckles cartridges for the Sega Mega CD supportDrive/Genesis that allowed a player to connect an older game to the cartridge's pass-through port for extended or altered gameplay.

* [[Genesis Plus GX]] is also very good With Sonic 3: Unlocks an alternate version of Sonic 3 with high compatibilitymore levels. The only thing it lacks is 32X support* With Sonic 2: Unlocks an alternate version of Sonic 2 with playable Knuckles. The port for RetroArch adds shader support, dynamic sync and * With Sonic 1: Unlocks the other features of RetroArchBlue Sphere minigame with a level select to all possible levels.

* [[Gens]], while having many iterations, is still Smaller than 2MB: Will play a very good emulator and very close single random level from the Blue Sphere minigame generated from data in the header.* Bigger than 2MB: Will boot to Kega Fusion but still has issuesSonic & Knuckles. Depending on which version you get your experience * Has Battery Pack: All save data will differ quite a lotbe wiped out.

* [[BlastEm]] aims Most emulators don't support Lock-On save for cycle accuracy Genesis Plus GX, but there are pre-combined ROMs for lower system requirementsthe Sonic trilogy available online that can be played as a regular Megadrive ROM on any emulator and still work. It is very early in development howeverThe Sonic 3 Complete romhack also achieves the same purpose.

Genesis Plus GX's [[RetroArch]] core includes true Lock-On emulation. From the Core Options menu, you can enable the Lock-On feature for either Sonic & Knuckles, Game Genie, or the Action Replay (Pro) -- the latter two using a different technology but with similar effects. Setting this option to anything other than "Off" will enable Lock-on to the cartridge you're currently playing as. After resetting, the game will boot in Lock-On mode. The following files need to be under the directory for BIOS files (usually "system"):* sk.bin (Sonic & Knuckles (2 MiB) ROM)* sk2chip.bin (Sonic & Knuckles UPMEM (256 KiB) ROM): If you can't find it online, extract it with a hex editor from a pre-combined Sonic 2 & Knuckles ROM from offset 00300000 to the end of the ROM. For GG/AR, the files needed are areplay.bin and ggenie.bin, but most emulators support cheat codes from these natively. ==ResourcesExternal links==